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Business Combinations (Narrative) (Details) (USD $)	Mar. 30, 2012	Jan. 09, 2012
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired		100.00%
AATI [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred		$ 277,344,000
Acquired Goodwill		138,796,000
Business Acquisition, Cost of Acquired Entity, Transaction Costs	$ 9,200,000

This element represents the acquisition-date fair value of the total consideration transferred which consists of the sum of the acquisition-date fair values of the assets transferred by the acquirer, the liabilities incurred by the acquirer to former owners of the acquiree, and the equity interests issued by the acquirer.

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